According to the 1873 Guide to the Church this memorial was originally sited in the North Transept, an area now largely occupied by the organ. It is believed that the memorial remains in situ behind the organ.
Memorial
(From the 1873 Guide)
NEAR THIS PLACE ARE DEPOSITED THE REMAINS OF MISS HANNAH BULLOCK, WHO DEPARTED THIS LIFE 24TH JANUARY, 1790, AGED 44 YEARS.